1 Answer

There are no special side effects for men. The side effects are for both men and women. 

Drowsiness. Because Nyquil contains an ingredient used to induce sleep, it can cause drowsiness and dizziness. Never take Nyquil before driving or operating machinery, as this can be very dangerous.

Nausea. It is not uncommon for certain individuals to experience nausea when taking Nyquil. There are several different ingredients in Nyquil used to treat cough, pain, fatugue, and the inability to sleep, all of which can cause nausea in certain individuals. If you begin vomiting after taking Nyquil, contact your health care provider as soon as possible.

Loss of appetite. Many individuals taking Nyquil experience loss of appetite. The taste of Nyquil can also be unpleasant for some, causing nausea, upset stomach, or loss of appetite.

Weakness. Like many drugs that induce sleep or cause drowsiness, Nyquil can also cause body weakness. If you feel weak after consuming Nyquil, stop whatever activity you are doing and lay down. Do not attempt to drive or participate in physical exercise.

Lightheadedness/headache. Along with drowsiness or sleepiness, Nyquil can cause mild lightheadedness or headache in certain individuals. Again, it is important to avoid driving and operating machinery while taking Nyquil or any drug with similar ingredients.

Shortness of breath. In rare cases, someone can experience a severe allergic reaction when taking Nyquil, and may experience shortness of breath. Other symptoms or signs of an allergic reaction can include an irregular heart beat, hives, tightness in mouth, seizures, trouble sleeping, tremors, and loss of vision. Contact emergency medical care as soon as possible if you experience an allergic reaction to Nyquil.

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